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1da177e4 LT |
1 | /* |
2 | * acpi_ac.c - ACPI AC Adapter Driver ($Revision: 27 $) | |
3 | * | |
4 | * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> | |
5 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> | |
6 | * | |
7 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or (at | |
12 | * your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, but | |
15 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * General Public License for more details. | |
18 | * | |
1da177e4 LT |
19 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
20 | */ | |
21 | ||
22 | #include <linux/kernel.h> | |
23 | #include <linux/module.h> | |
5a0e3ad6 | 24 | #include <linux/slab.h> |
1da177e4 LT |
25 | #include <linux/init.h> |
26 | #include <linux/types.h> | |
0ab5bb64 LT |
27 | #include <linux/dmi.h> |
28 | #include <linux/delay.h> | |
e63f6e28 LT |
29 | #ifdef CONFIG_ACPI_PROCFS_POWER |
30 | #include <linux/proc_fs.h> | |
31 | #include <linux/seq_file.h> | |
32 | #endif | |
cc8ef527 | 33 | #include <linux/platform_device.h> |
d5b4a3d0 | 34 | #include <linux/power_supply.h> |
8b48463f | 35 | #include <linux/acpi.h> |
4eee4f03 | 36 | #include "battery.h" |
1da177e4 | 37 | |
a192a958 LB |
38 | #define PREFIX "ACPI: " |
39 | ||
1da177e4 | 40 | #define ACPI_AC_CLASS "ac_adapter" |
1da177e4 LT |
41 | #define ACPI_AC_DEVICE_NAME "AC Adapter" |
42 | #define ACPI_AC_FILE_STATE "state" | |
43 | #define ACPI_AC_NOTIFY_STATUS 0x80 | |
44 | #define ACPI_AC_STATUS_OFFLINE 0x00 | |
45 | #define ACPI_AC_STATUS_ONLINE 0x01 | |
46 | #define ACPI_AC_STATUS_UNKNOWN 0xFF | |
47 | ||
48 | #define _COMPONENT ACPI_AC_COMPONENT | |
f52fd66d | 49 | ACPI_MODULE_NAME("ac"); |
1da177e4 | 50 | |
f52fd66d | 51 | MODULE_AUTHOR("Paul Diefenbaugh"); |
7cda93e0 | 52 | MODULE_DESCRIPTION("ACPI AC Adapter Driver"); |
1da177e4 LT |
53 | MODULE_LICENSE("GPL"); |
54 | ||
e63f6e28 | 55 | |
98012849 GR |
56 | static int acpi_ac_add(struct acpi_device *device); |
57 | static int acpi_ac_remove(struct acpi_device *device); | |
58 | static void acpi_ac_notify(struct acpi_device *device, u32 event); | |
59 | ||
60 | static const struct acpi_device_id ac_device_ids[] = { | |
61 | {"ACPI0003", 0}, | |
62 | {"", 0}, | |
63 | }; | |
64 | MODULE_DEVICE_TABLE(acpi, ac_device_ids); | |
65 | ||
66 | #ifdef CONFIG_PM_SLEEP | |
67 | static int acpi_ac_resume(struct device *dev); | |
68 | #endif | |
69 | static SIMPLE_DEV_PM_OPS(acpi_ac_pm, NULL, acpi_ac_resume); | |
70 | ||
e63f6e28 LT |
71 | #ifdef CONFIG_ACPI_PROCFS_POWER |
72 | extern struct proc_dir_entry *acpi_lock_ac_dir(void); | |
73 | extern void *acpi_unlock_ac_dir(struct proc_dir_entry *acpi_ac_dir); | |
74 | static int acpi_ac_open_fs(struct inode *inode, struct file *file); | |
75 | #endif | |
76 | ||
77 | ||
0ab5bb64 LT |
78 | static int ac_sleep_before_get_state_ms; |
79 | ||
98012849 GR |
80 | static struct acpi_driver acpi_ac_driver = { |
81 | .name = "ac", | |
82 | .class = ACPI_AC_CLASS, | |
83 | .ids = ac_device_ids, | |
84 | .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS, | |
85 | .ops = { | |
86 | .add = acpi_ac_add, | |
87 | .remove = acpi_ac_remove, | |
88 | .notify = acpi_ac_notify, | |
89 | }, | |
90 | .drv.pm = &acpi_ac_pm, | |
91 | }; | |
92 | ||
1da177e4 | 93 | struct acpi_ac { |
297d716f KK |
94 | struct power_supply *charger; |
95 | struct power_supply_desc charger_desc; | |
98012849 | 96 | struct acpi_device * device; |
27663c58 | 97 | unsigned long long state; |
4eee4f03 | 98 | struct notifier_block battery_nb; |
1da177e4 LT |
99 | }; |
100 | ||
297d716f | 101 | #define to_acpi_ac(x) power_supply_get_drvdata(x) |
d5b4a3d0 | 102 | |
e63f6e28 LT |
103 | #ifdef CONFIG_ACPI_PROCFS_POWER |
104 | static const struct file_operations acpi_ac_fops = { | |
105 | .owner = THIS_MODULE, | |
106 | .open = acpi_ac_open_fs, | |
107 | .read = seq_read, | |
108 | .llseek = seq_lseek, | |
109 | .release = single_release, | |
110 | }; | |
111 | #endif | |
112 | ||
1da177e4 LT |
113 | /* -------------------------------------------------------------------------- |
114 | AC Adapter Management | |
115 | -------------------------------------------------------------------------- */ | |
116 | ||
4be44fcd | 117 | static int acpi_ac_get_state(struct acpi_ac *ac) |
1da177e4 | 118 | { |
98012849 GR |
119 | acpi_status status = AE_OK; |
120 | ||
121 | if (!ac) | |
122 | return -EINVAL; | |
1da177e4 | 123 | |
98012849 | 124 | status = acpi_evaluate_integer(ac->device->handle, "_PSR", NULL, |
cc8ef527 | 125 | &ac->state); |
1da177e4 | 126 | if (ACPI_FAILURE(status)) { |
cc8ef527 ZR |
127 | ACPI_EXCEPTION((AE_INFO, status, |
128 | "Error reading AC Adapter state")); | |
1da177e4 | 129 | ac->state = ACPI_AC_STATUS_UNKNOWN; |
d550d98d | 130 | return -ENODEV; |
1da177e4 | 131 | } |
4be44fcd | 132 | |
d550d98d | 133 | return 0; |
1da177e4 LT |
134 | } |
135 | ||
3151dbb0 ZR |
136 | /* -------------------------------------------------------------------------- |
137 | sysfs I/F | |
138 | -------------------------------------------------------------------------- */ | |
139 | static int get_ac_property(struct power_supply *psy, | |
140 | enum power_supply_property psp, | |
141 | union power_supply_propval *val) | |
142 | { | |
143 | struct acpi_ac *ac = to_acpi_ac(psy); | |
144 | ||
145 | if (!ac) | |
146 | return -ENODEV; | |
147 | ||
148 | if (acpi_ac_get_state(ac)) | |
149 | return -ENODEV; | |
150 | ||
151 | switch (psp) { | |
152 | case POWER_SUPPLY_PROP_ONLINE: | |
153 | val->intval = ac->state; | |
154 | break; | |
155 | default: | |
156 | return -EINVAL; | |
157 | } | |
158 | return 0; | |
159 | } | |
160 | ||
161 | static enum power_supply_property ac_props[] = { | |
162 | POWER_SUPPLY_PROP_ONLINE, | |
163 | }; | |
164 | ||
e63f6e28 LT |
165 | #ifdef CONFIG_ACPI_PROCFS_POWER |
166 | /* -------------------------------------------------------------------------- | |
167 | FS Interface (/proc) | |
168 | -------------------------------------------------------------------------- */ | |
169 | ||
170 | static struct proc_dir_entry *acpi_ac_dir; | |
171 | ||
172 | static int acpi_ac_seq_show(struct seq_file *seq, void *offset) | |
173 | { | |
174 | struct acpi_ac *ac = seq->private; | |
175 | ||
176 | ||
177 | if (!ac) | |
178 | return 0; | |
179 | ||
180 | if (acpi_ac_get_state(ac)) { | |
181 | seq_puts(seq, "ERROR: Unable to read AC Adapter state\n"); | |
182 | return 0; | |
183 | } | |
184 | ||
185 | seq_puts(seq, "state: "); | |
186 | switch (ac->state) { | |
187 | case ACPI_AC_STATUS_OFFLINE: | |
188 | seq_puts(seq, "off-line\n"); | |
189 | break; | |
190 | case ACPI_AC_STATUS_ONLINE: | |
191 | seq_puts(seq, "on-line\n"); | |
192 | break; | |
193 | default: | |
194 | seq_puts(seq, "unknown\n"); | |
195 | break; | |
196 | } | |
197 | ||
198 | return 0; | |
199 | } | |
200 | ||
201 | static int acpi_ac_open_fs(struct inode *inode, struct file *file) | |
202 | { | |
203 | return single_open(file, acpi_ac_seq_show, PDE_DATA(inode)); | |
204 | } | |
205 | ||
206 | static int acpi_ac_add_fs(struct acpi_ac *ac) | |
207 | { | |
208 | struct proc_dir_entry *entry = NULL; | |
209 | ||
210 | printk(KERN_WARNING PREFIX "Deprecated procfs I/F for AC is loaded," | |
211 | " please retry with CONFIG_ACPI_PROCFS_POWER cleared\n"); | |
212 | if (!acpi_device_dir(ac->device)) { | |
213 | acpi_device_dir(ac->device) = | |
214 | proc_mkdir(acpi_device_bid(ac->device), acpi_ac_dir); | |
215 | if (!acpi_device_dir(ac->device)) | |
216 | return -ENODEV; | |
217 | } | |
218 | ||
219 | /* 'state' [R] */ | |
220 | entry = proc_create_data(ACPI_AC_FILE_STATE, | |
221 | S_IRUGO, acpi_device_dir(ac->device), | |
222 | &acpi_ac_fops, ac); | |
223 | if (!entry) | |
224 | return -ENODEV; | |
225 | return 0; | |
226 | } | |
227 | ||
228 | static int acpi_ac_remove_fs(struct acpi_ac *ac) | |
229 | { | |
230 | ||
231 | if (acpi_device_dir(ac->device)) { | |
232 | remove_proc_entry(ACPI_AC_FILE_STATE, | |
233 | acpi_device_dir(ac->device)); | |
234 | remove_proc_entry(acpi_device_bid(ac->device), acpi_ac_dir); | |
235 | acpi_device_dir(ac->device) = NULL; | |
236 | } | |
237 | ||
238 | return 0; | |
239 | } | |
240 | #endif | |
241 | ||
1da177e4 LT |
242 | /* -------------------------------------------------------------------------- |
243 | Driver Model | |
244 | -------------------------------------------------------------------------- */ | |
245 | ||
98012849 | 246 | static void acpi_ac_notify(struct acpi_device *device, u32 event) |
1da177e4 | 247 | { |
98012849 | 248 | struct acpi_ac *ac = acpi_driver_data(device); |
1da177e4 LT |
249 | |
250 | if (!ac) | |
d550d98d | 251 | return; |
1da177e4 | 252 | |
1da177e4 | 253 | switch (event) { |
f163ff51 LB |
254 | default: |
255 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
256 | "Unsupported event [0x%x]\n", event)); | |
1da177e4 | 257 | case ACPI_AC_NOTIFY_STATUS: |
03d78252 CL |
258 | case ACPI_NOTIFY_BUS_CHECK: |
259 | case ACPI_NOTIFY_DEVICE_CHECK: | |
0ab5bb64 LT |
260 | /* |
261 | * A buggy BIOS may notify AC first and then sleep for | |
262 | * a specific time before doing actual operations in the | |
263 | * EC event handler (_Qxx). This will cause the AC state | |
264 | * reported by the ACPI event to be incorrect, so wait for a | |
265 | * specific time for the EC event handler to make progress. | |
266 | */ | |
267 | if (ac_sleep_before_get_state_ms > 0) | |
268 | msleep(ac_sleep_before_get_state_ms); | |
269 | ||
1da177e4 | 270 | acpi_ac_get_state(ac); |
98012849 GR |
271 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
272 | dev_name(&device->dev), event, | |
273 | (u32) ac->state); | |
274 | acpi_notifier_call_chain(device, event, (u32) ac->state); | |
297d716f | 275 | kobject_uevent(&ac->charger->dev.kobj, KOBJ_CHANGE); |
1da177e4 LT |
276 | } |
277 | ||
d550d98d | 278 | return; |
1da177e4 LT |
279 | } |
280 | ||
4eee4f03 AM |
281 | static int acpi_ac_battery_notify(struct notifier_block *nb, |
282 | unsigned long action, void *data) | |
283 | { | |
284 | struct acpi_ac *ac = container_of(nb, struct acpi_ac, battery_nb); | |
285 | struct acpi_bus_event *event = (struct acpi_bus_event *)data; | |
286 | ||
287 | /* | |
288 | * On HP Pavilion dv6-6179er AC status notifications aren't triggered | |
289 | * when adapter is plugged/unplugged. However, battery status | |
290 | * notifcations are triggered when battery starts charging or | |
291 | * discharging. Re-reading AC status triggers lost AC notifications, | |
292 | * if AC status has changed. | |
293 | */ | |
294 | if (strcmp(event->device_class, ACPI_BATTERY_CLASS) == 0 && | |
295 | event->type == ACPI_BATTERY_NOTIFY_STATUS) | |
296 | acpi_ac_get_state(ac); | |
297 | ||
298 | return NOTIFY_OK; | |
299 | } | |
300 | ||
0ab5bb64 LT |
301 | static int thinkpad_e530_quirk(const struct dmi_system_id *d) |
302 | { | |
303 | ac_sleep_before_get_state_ms = 1000; | |
304 | return 0; | |
305 | } | |
306 | ||
44f610cd | 307 | static const struct dmi_system_id ac_dmi_table[] = { |
0ab5bb64 LT |
308 | { |
309 | .callback = thinkpad_e530_quirk, | |
310 | .ident = "thinkpad e530", | |
311 | .matches = { | |
312 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
313 | DMI_MATCH(DMI_PRODUCT_NAME, "32597CG"), | |
314 | }, | |
315 | }, | |
316 | {}, | |
317 | }; | |
318 | ||
98012849 | 319 | static int acpi_ac_add(struct acpi_device *device) |
1da177e4 | 320 | { |
297d716f | 321 | struct power_supply_config psy_cfg = {}; |
4be44fcd | 322 | int result = 0; |
4be44fcd | 323 | struct acpi_ac *ac = NULL; |
1da177e4 | 324 | |
1da177e4 | 325 | |
98012849 GR |
326 | if (!device) |
327 | return -EINVAL; | |
cc8ef527 | 328 | |
36bcbec7 | 329 | ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL); |
1da177e4 | 330 | if (!ac) |
d550d98d | 331 | return -ENOMEM; |
1da177e4 | 332 | |
98012849 GR |
333 | ac->device = device; |
334 | strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME); | |
335 | strcpy(acpi_device_class(device), ACPI_AC_CLASS); | |
336 | device->driver_data = ac; | |
1da177e4 LT |
337 | |
338 | result = acpi_ac_get_state(ac); | |
339 | if (result) | |
340 | goto end; | |
341 | ||
297d716f KK |
342 | psy_cfg.drv_data = ac; |
343 | ||
344 | ac->charger_desc.name = acpi_device_bid(device); | |
e63f6e28 LT |
345 | #ifdef CONFIG_ACPI_PROCFS_POWER |
346 | result = acpi_ac_add_fs(ac); | |
347 | if (result) | |
348 | goto end; | |
349 | #endif | |
297d716f KK |
350 | ac->charger_desc.type = POWER_SUPPLY_TYPE_MAINS; |
351 | ac->charger_desc.properties = ac_props; | |
352 | ac->charger_desc.num_properties = ARRAY_SIZE(ac_props); | |
353 | ac->charger_desc.get_property = get_ac_property; | |
354 | ac->charger = power_supply_register(&ac->device->dev, | |
355 | &ac->charger_desc, &psy_cfg); | |
356 | if (IS_ERR(ac->charger)) { | |
357 | result = PTR_ERR(ac->charger); | |
f197ac13 | 358 | goto end; |
297d716f | 359 | } |
1da177e4 | 360 | |
4be44fcd | 361 | printk(KERN_INFO PREFIX "%s [%s] (%s)\n", |
98012849 | 362 | acpi_device_name(device), acpi_device_bid(device), |
4be44fcd | 363 | ac->state ? "on-line" : "off-line"); |
1da177e4 | 364 | |
4eee4f03 AM |
365 | ac->battery_nb.notifier_call = acpi_ac_battery_notify; |
366 | register_acpi_notifier(&ac->battery_nb); | |
ab0fd674 | 367 | end: |
e63f6e28 LT |
368 | if (result) { |
369 | #ifdef CONFIG_ACPI_PROCFS_POWER | |
370 | acpi_ac_remove_fs(ac); | |
371 | #endif | |
1da177e4 | 372 | kfree(ac); |
e63f6e28 | 373 | } |
1da177e4 | 374 | |
0ab5bb64 | 375 | dmi_check_system(ac_dmi_table); |
d550d98d | 376 | return result; |
1da177e4 LT |
377 | } |
378 | ||
90692404 | 379 | #ifdef CONFIG_PM_SLEEP |
ccda7069 | 380 | static int acpi_ac_resume(struct device *dev) |
5bfeca31 AS |
381 | { |
382 | struct acpi_ac *ac; | |
383 | unsigned old_state; | |
ccda7069 RW |
384 | |
385 | if (!dev) | |
386 | return -EINVAL; | |
387 | ||
98012849 | 388 | ac = acpi_driver_data(to_acpi_device(dev)); |
ccda7069 | 389 | if (!ac) |
5bfeca31 | 390 | return -EINVAL; |
ccda7069 | 391 | |
5bfeca31 AS |
392 | old_state = ac->state; |
393 | if (acpi_ac_get_state(ac)) | |
394 | return 0; | |
395 | if (old_state != ac->state) | |
297d716f | 396 | kobject_uevent(&ac->charger->dev.kobj, KOBJ_CHANGE); |
5bfeca31 AS |
397 | return 0; |
398 | } | |
06521c2e SK |
399 | #else |
400 | #define acpi_ac_resume NULL | |
90692404 | 401 | #endif |
5bfeca31 | 402 | |
98012849 | 403 | static int acpi_ac_remove(struct acpi_device *device) |
1da177e4 | 404 | { |
98012849 GR |
405 | struct acpi_ac *ac = NULL; |
406 | ||
1da177e4 | 407 | |
98012849 | 408 | if (!device || !acpi_driver_data(device)) |
d550d98d | 409 | return -EINVAL; |
1da177e4 | 410 | |
98012849 | 411 | ac = acpi_driver_data(device); |
1da177e4 | 412 | |
297d716f | 413 | power_supply_unregister(ac->charger); |
4eee4f03 | 414 | unregister_acpi_notifier(&ac->battery_nb); |
cc8ef527 | 415 | |
e63f6e28 LT |
416 | #ifdef CONFIG_ACPI_PROCFS_POWER |
417 | acpi_ac_remove_fs(ac); | |
418 | #endif | |
419 | ||
1da177e4 LT |
420 | kfree(ac); |
421 | ||
d550d98d | 422 | return 0; |
1da177e4 LT |
423 | } |
424 | ||
4be44fcd | 425 | static int __init acpi_ac_init(void) |
1da177e4 | 426 | { |
3f86b832 | 427 | int result; |
1da177e4 | 428 | |
4d8316d5 PM |
429 | if (acpi_disabled) |
430 | return -ENODEV; | |
1da177e4 | 431 | |
e63f6e28 LT |
432 | #ifdef CONFIG_ACPI_PROCFS_POWER |
433 | acpi_ac_dir = acpi_lock_ac_dir(); | |
434 | if (!acpi_ac_dir) | |
435 | return -ENODEV; | |
436 | #endif | |
437 | ||
438 | ||
98012849 | 439 | result = acpi_bus_register_driver(&acpi_ac_driver); |
e63f6e28 LT |
440 | if (result < 0) { |
441 | #ifdef CONFIG_ACPI_PROCFS_POWER | |
442 | acpi_unlock_ac_dir(acpi_ac_dir); | |
443 | #endif | |
d550d98d | 444 | return -ENODEV; |
e63f6e28 | 445 | } |
1da177e4 | 446 | |
d550d98d | 447 | return 0; |
1da177e4 LT |
448 | } |
449 | ||
4be44fcd | 450 | static void __exit acpi_ac_exit(void) |
1da177e4 | 451 | { |
98012849 | 452 | acpi_bus_unregister_driver(&acpi_ac_driver); |
e63f6e28 LT |
453 | #ifdef CONFIG_ACPI_PROCFS_POWER |
454 | acpi_unlock_ac_dir(acpi_ac_dir); | |
455 | #endif | |
1da177e4 | 456 | } |
1da177e4 LT |
457 | module_init(acpi_ac_init); |
458 | module_exit(acpi_ac_exit); |